fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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reid horuff 6f71d3b68b Improve perf of Pessimistic Transaction expirations (and optimistic transactions) ... Summary: copy from task 8196669: 1) Optimistic transactions do not support batching writes from different threads. 2) Pessimistic transactions do not support batching writes if an expiration time is set. In these 2 cases, we currently do not do any write batching in DBImpl::WriteImpl() because there is a WriteCallback that could decide at the last minute to abort the write. But we could support batching write operations with callbacks if we make sure to process the callbacks correctly. To do this, we would first need to modify write_thread.cc to stop preventing writes with callbacks from being batched together. Then we would need to change DBImpl::WriteImpl() to call all WriteCallback's in a batch, only write the batches that succeed, and correctly set the state of each batch's WriteThread::Writer. Test Plan: Added test WriteWithCallbackTest to write_callback_test.cc which creates multiple client threads and verifies that writes are batched and executed properly. Reviewers: hermanlee4, anthony, ngbronson Subscribers: leveldb, dhruba Differential Revision: https://reviews.facebook.net/D52863		9 years ago
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optimistic_transaction_db_impl.cc	Pessimistic Transactions	9 years ago
optimistic_transaction_db_impl.h	Pessimistic Transactions	9 years ago
optimistic_transaction_impl.cc	transaction allocation perf improvements	9 years ago
optimistic_transaction_impl.h	Improve perf of Pessimistic Transaction expirations (and optimistic transactions)	9 years ago
optimistic_transaction_test.cc	Transaction stats	9 years ago
transaction_base.cc	transaction allocation perf improvements	9 years ago
transaction_base.h	transaction allocation perf improvements	9 years ago
transaction_db_impl.cc	Removing data race from expirable transactions	9 years ago
transaction_db_impl.h	Removing data race from expirable transactions	9 years ago
transaction_db_mutex_impl.cc	Do not use timed_mutex in TransactionDB	9 years ago
transaction_db_mutex_impl.h	TransactionDB Custom Locking API	9 years ago
transaction_impl.cc	Removing data race from expirable transactions	9 years ago
transaction_impl.h	Improve perf of Pessimistic Transaction expirations (and optimistic transactions)	9 years ago
transaction_lock_mgr.cc	Removing data race from expirable transactions	9 years ago
transaction_lock_mgr.h	Removing data race from expirable transactions	9 years ago
transaction_test.cc	Removing data race from expirable transactions	9 years ago
transaction_util.cc	Use SST files for Transaction conflict detection	9 years ago
transaction_util.h	Use SST files for Transaction conflict detection	9 years ago